Shawn Kemp Attorney Says Parking Lot Shooting 'Reasonable And Legally Justified'

Shawn Kemp's attorney just released a statement on the ex-NBA star's arrest ... saying his actions were "reasonable and legally justified" when he fired a gun in a shopping mall parking lot -- alleging thieves opened fire on him first.

W. Scott Boatman addressed the situation in a lengthy note on Thursday -- shortly after Kemp was released from jail -- saying the incident started after his client's property, including an iPhone, was stolen from his car Tuesday night.

Boatman says Kemp tracked his phone to an occupied car that was parked near a Tacoma, WA shopping center on Wednesday ... and when he approached the vehicle, the individuals inside shot at him.

The attorney says Kemp returned fire, but only out of self-defense ... and he remained at the scene and spoke with cops "in an attempt to assist in the matter."

No one was injured during the incident.

Kemp was arrested and booked for a drive-by shooting Wednesday night ... and spent the night behind bars before being released less than 24 hours later.

Kemp's attorney is also disputing that there was a "drive-by shooting" ... but according to Washington state legislature, a drive-by shooting is described as when someone "recklessly discharges a firearm as defined in RCW 9.41.010 in a manner which creates a substantial risk of death or serious physical injury to another person and the discharge is either from a motor vehicle or from the immediate area of a motor vehicle that was used to transport the shooter or the firearm, or both, to the scene of the discharge."

As we previously reported, part of the incident was captured on video ... showing Kemp fire his gun, drive around the parking lot and drop an item in a bush before speaking with police.

Cops later retrieved a revolver from that same location.